In China, teachers allow children to sleep in class for around 20 minutes to help improve their learning.
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One reason that kittens sleep so much is because a growth hormone is released only during sleep.
212
A new baby usually deprives each of it's parents around 350-400 hours of sleep in the first year. That is one entire nights sleep per week, per parent.
194
There's a love mattress that is specifically designed for couples who sleep on each other's arms.
12
The harder you concentrate on falling asleep, the less likely you are to fall asleep.
34
Bats sleep 18-20 hours per day.
5